Head First EJB

Some transactions don’t propagate

The caller’s transaction might be suspended

If a transactional bean method calls another method, the called method (whether it’s in the same or a different bean) might not run in the same transaction. The called method, in that case, will run with either a brand new transaction, or with no transaction at all. (In a few minutes, we’ll look at how the container decides whether to propagate the transaction, run without one, or start a new one.)

1. The first transaction is suspended and the second method runs without a transaction.

   

2. The first transaction is suspended and the second method runs within a new transaction.